Make them 'bookable' for any content on offer through Netflix at whatever cost Netflix feels is appropriate for the content / length. Person who pays for booking out the Netflix cinema then advertises and sells tickets through the "Netflix Cinema" ticket sales interface, Netflix gets a percentage and the rest goes to the organiser.

I've been considering doing something like this as an excuse to catch up with friends over a movie, but make it a bit more slick than your regular get-together. Too busy to put much thought into it, yet another to-do on the post-retirement list.

Yes, but then it will run into that ol' leverage chestnut that will go something like: "If you allow Netflix to screen your film it will not be allowed in ours". Plus the upkeep on a theater is probably considerable, with building maintenance, rent, other expenses and so on. Would Netflix even be able to make a profit from that kind of overhead?